166 lines
4.0 KiB
C
166 lines
4.0 KiB
C
/* $NetBSD: sram.c,v 1.4 1996/10/13 03:35:08 christos Exp $ */
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/*
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* Copyright (c) 1994 Kazuhisa Shimizu.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Kazuhisa Shimizu.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/ioctl.h>
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#include <sys/file.h>
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#include <sys/malloc.h>
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#include <sys/systm.h>
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#include <machine/sram.h>
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#include <x68k/dev/sramvar.h>
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#include <x68k/x68k/iodevice.h>
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#include "sram.h"
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struct sram_softc sram_softc;
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#ifdef DEBUG
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#define SRAM_DEBUG_OPEN 0x01
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#define SRAM_DEBUG_CLOSE 0x02
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#define SRAM_DEBUG_IOCTL 0x03
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int sramdebug = SRAM_DEBUG_IOCTL;
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#endif
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/*
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* functions for probeing.
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*/
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/* ARGSUSED */
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void
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sramattach(num)
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int num;
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{
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sram_softc.flags = 0;
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printf("sram0: 16k bytes accessible\n");
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}
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/*
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* functions made available by conf.c
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*/
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/*ARGSUSED*/
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int
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sramopen(dev, flags)
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dev_t dev;
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int flags;
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{
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struct sram_softc *su = &sram_softc;
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#ifdef DEBUG
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if (sramdebug & SRAM_DEBUG_OPEN)
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printf ("Sram open\n");
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#endif
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if (minor(dev) >= 1)
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return EXDEV;
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if (su->flags & SRF_OPEN) {
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return (EBUSY);
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}
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su->flags |= SRF_OPEN;
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return (0);
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}
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/*ARGSUSED*/
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void
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sramclose (dev, flags)
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dev_t dev;
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int flags;
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{
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struct sram_softc *su = &sram_softc;
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#ifdef DEBUG
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if (sramdebug & SRAM_DEBUG_CLOSE)
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printf ("Sram close\n");
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#endif
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if (su->flags & SRF_OPEN) {
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su->flags = 0;
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}
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}
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/*ARGSUSED*/
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int
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sramioctl (dev, cmd, data, flag, p)
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dev_t dev;
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u_long cmd;
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caddr_t data;
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int flag;
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struct proc *p;
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{
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int error = 0;
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struct sram_io *sram_io;
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register char *sramtop = IODEVbase->io_sram;
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#ifdef DEBUG
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if (sramdebug & SRAM_DEBUG_IOCTL)
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printf("Sram ioctl cmd=%lx\n", cmd);
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#endif
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sram_io = (struct sram_io *)data;
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switch (cmd) {
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case SIOGSRAM:
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#ifdef DEBUG
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if (sramdebug & SRAM_DEBUG_IOCTL) {
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printf("Sram ioctl SIOGSRAM address=%p\n", data);
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printf("Sram ioctl SIOGSRAM offset=%x\n", sram_io->offset);
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}
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#endif
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if (sram_io == NULL ||
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sram_io->offset + SRAM_IO_SIZE > SRAM_SIZE)
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return(EFAULT);
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bcopy(sramtop + sram_io->offset, &(sram_io->sram), SRAM_IO_SIZE);
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break;
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case SIOPSRAM:
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#ifdef DEBUG
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if (sramdebug & SRAM_DEBUG_IOCTL) {
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printf("Sram ioctl SIOSSRAM address=%p\n", data);
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printf("Sram ioctl SIOSSRAM offset=%x\n", sram_io->offset);
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}
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#endif
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if (sram_io == NULL ||
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sram_io->offset + SRAM_IO_SIZE > SRAM_SIZE)
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return(EFAULT);
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sysport.sramwp = 0x31;
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bcopy(&(sram_io->sram), sramtop + sram_io->offset,SRAM_IO_SIZE);
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sysport.sramwp = 0x00;
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break;
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default:
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error = EINVAL;
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break;
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}
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return (error);
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}
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